states coast guard, fbi and the media for all of their hard work and diligence. she says both kids are doing great. >>> police in pittsburgh are piecing together clues in the murder of an 18-year-old that was killed just as about he was about to tape a music video. it happened friday evening in buchanan park. abc7 news reporter sergio has details. >> to his fans the 18-year-old musician was known as mac day. this is a film he filmed this friends earlier this summer. his real name is da von george. he was shot to death friday night. his family is struggling to understand the brutality of his murder. >> he's a well-behaved kids. he has a lot of love in him. and the sad thing about it is his little brothers and sisters were there when this all unfolded. >> police tell us devon and about five other people were about to begin filming at buchanan park when two other people walked up to them and an argument broke out. the group started running in different directions to get away. police tell us devon george was shot in the back. it happened to broad daylight and investi